ide: use per-port IRQ handlers
Use hwif instead of hwgroup as {request,free}_irq()'s cookie,
teach ide_intr() to return early for non-active serialized ports,
modify unexpected_intr() accordingly and then use per-port IRQ
handlers instead of per-hwgroup ones.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 43bf43d..1fc739f 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -723,7 +723,7 @@
spin_unlock_irq(q->queue_lock);
spin_lock_irq(&hwgroup->lock);
- if (!ide_lock_hwgroup(hwgroup)) {
+ if (!ide_lock_hwgroup(hwgroup, hwif)) {
ide_hwif_t *prev_port;
repeat:
prev_port = hwif->host->cur_port;
@@ -1002,44 +1002,30 @@
* before completing the issuance of any new drive command, so we will not
* be accidentally invoked as a result of any valid command completion
* interrupt.
- *
- * Note that we must walk the entire hwgroup here. We know which hwif
- * is doing the current command, but we don't know which hwif burped
- * mysteriously.
*/
static void unexpected_intr(int irq, ide_hwif_t *hwif)
{
- ide_hwgroup_t *hwgroup = hwif->hwgroup;
- u8 stat;
+ u8 stat = hwif->tp_ops->read_status(hwif);
- /*
- * handle the unexpected interrupt
- */
- do {
- if (hwif->irq == irq) {
- stat = hwif->tp_ops->read_status(hwif);
+ if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
+ /* Try to not flood the console with msgs */
+ static unsigned long last_msgtime, count;
+ ++count;
- if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
- /* Try to not flood the console with msgs */
- static unsigned long last_msgtime, count;
- ++count;
- if (time_after(jiffies, last_msgtime + HZ)) {
- last_msgtime = jiffies;
- printk(KERN_ERR "%s%s: unexpected interrupt, "
- "status=0x%02x, count=%ld\n",
- hwif->name,
- (hwif->next==hwgroup->hwif) ? "" : "(?)", stat, count);
- }
- }
+ if (time_after(jiffies, last_msgtime + HZ)) {
+ last_msgtime = jiffies;
+ printk(KERN_ERR "%s: unexpected interrupt, "
+ "status=0x%02x, count=%ld\n",
+ hwif->name, stat, count);
}
- } while ((hwif = hwif->next) != hwgroup->hwif);
+ }
}
/**
* ide_intr - default IDE interrupt handler
* @irq: interrupt number
- * @dev_id: hwif group
+ * @dev_id: hwif
* @regs: unused weirdness from the kernel irq layer
*
* This is the default IRQ handler for the IDE layer. You should
@@ -1063,17 +1049,19 @@
irqreturn_t ide_intr (int irq, void *dev_id)
{
- unsigned long flags;
- ide_hwgroup_t *hwgroup = (ide_hwgroup_t *)dev_id;
- ide_hwif_t *hwif = hwgroup->hwif;
+ ide_hwif_t *hwif = (ide_hwif_t *)dev_id;
+ ide_hwgroup_t *hwgroup = hwif->hwgroup;
ide_drive_t *uninitialized_var(drive);
ide_handler_t *handler;
+ unsigned long flags;
ide_startstop_t startstop;
irqreturn_t irq_ret = IRQ_NONE;
int plug_device = 0;
- if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
- hwif = hwif->host->cur_port;
+ if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) {
+ if (hwif != hwif->host->cur_port)
+ goto out_early;
+ }
spin_lock_irqsave(&hwgroup->lock, flags);
@@ -1172,7 +1160,7 @@
irq_ret = IRQ_HANDLED;
out:
spin_unlock_irqrestore(&hwgroup->lock, flags);
-
+out_early:
if (plug_device)
ide_plug_device(drive);
